bbe 882i sonic maximiser 电路图.pdf

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1、User Guide and Reference Manual SONIC MAXIMIZER 882 RadioFans.CN 收音机爱 好者资料库 i RadioFans.CN 收音机爱 好者资料库 1 Important Safeguardsi BBE Process Explained1 Product Description 2 Applications 2 Front Panel Controls3 Rear Panel Connections 4 Specifications 5 General Operation5 Application Diagrams6-10 Servic

2、e /Warranty / Maintenance 11 Calibration Procedures 12 Schematic Diagrams13-16 Congratulations on your purchase of the BBE 882 Sonic Maximizera balanced, two channel signal processor that will benefit any recording or sound reproduction system. You now own a very unique signal processing device with

3、 no equal in the audio world. Whether you purchased the BBE 882 for your recording studio, P.A., DJ system, or instrument rack, you will find the 882s rugged construction and careful electronic design a welcome addition to your sonic arsenal. Thank you for your purchase, and for the trust that youve

4、 placed in BBE. We are committed to bringing you the finest products, with useful and unique features to serve your audio needs. The BBE ProcessWhat it Is Loudspeakers have difficulty working with the electronic signals supplied by an amplifier. These difficulties cause such major phase and amplitud

5、e distortion that the sound reproduced by the speaker differs significantly from the sound produced by the original source. In the past, these problems proved unsolvable and were thus relegated to a position of secondary importance in audio system design. However, phase and amplitude integrity is es

6、sential to accurate sound reproduction. Research shows that the information which the listener translates into the recognizable characteristics of a live performance are intimately tied into complex time and amplitude relationships between the fundamental and harmonic components of a given musical n

7、ote or sound. These relationships define a sounds “sound”. When these complex relationships pass through a speaker, the proper order is lost. The higher frequencies are delayed. A lower frequency may reach the listeners ear first or perhaps simultaneously with that of a higher frequency. In some cas

8、es, the fundamental components may be so time-shifted that they reach the listeners ear ahead of some or all of the harmonic components. This change in the phase and amplitude relationship on the harmonic and fundamental frequencies is technically called “envelope distortion.” The listener perceives

9、 this loss of sound integrity in the reproduced sound as “muddy” and “smeared.” In the extreme, it can become difficult to tell the difference between musical instruments, for example, an oboe and a clarinet. BBE Sound, Inc. conducted extensive studies of numerous speaker systems over a ten year per

10、iod. With this knowledge, it became possible to identify the characteristics of an ideal speaker and to distill the corrections necessary to return the fundamental and harmonic frequency structures to their correct order. While there are differences among various speaker designs in the magnitude of

11、their correction, the overall pattern of correction needed is remarkably consistent. The BBE Process is so unique that 42 patents have been awarded by the U.S. Patent Office. TABLE OF CONTENTS Product Description The BBE 882 is a dual channel, single rack space device for use in +4dBu balanced line

12、applications. Each of the two independent channels has a Lo Contour control, Process control and a 5 segment LED input level meter. A single function button switches the BBE process on or off in both channels, which is useful for comparing the processed sound to the unprocessed sound. An LED next to

13、 the function button glows green when the BBE process is on and red when the process is off. The Lo Contour controls are for adjusting the level of phase corrected low frequencies in the program material. The Process controls are for adjusting the level of phase corrected high frequencies in the pro

14、gram material. Things to Remember The BBE 882 is designed to work with +4dBu signal levels. This is suitable for use with professional P.A. systems, recording studios or nightclub sound systems. The BBE 882 drives load impedances down to 600 Ohms and supplies a maximum output level of +23dBu. Pluggi

15、ng a guitar, microphone or other high impedance device directly into the BBE 882 will not work properly as its input impedance is less than 14.7K Ohms. Set-Up The BBE 882 is connected into the signal chain in series with the signal path the same way a graphic equalizer or limiter would be. The outpu

16、t of a mixer, pre-amp, or other sound source feeds the input of the BBE 882. Setting up the BBE 882 as an echo send device like a digital reverb is not recommended as the processed effect is not fully realized when summed with the original source audio. APPLICATIONS Music and P.A. Systems The BBE 88

17、2 is a welcome addition to any live sound P.A. system because the BBE circuit dramatically improves the clarity and intelligibility of vocals and musical instruments. Night club and mobile DJ systems will also benefit greatly from the BBE Process, with more depth, detail and punch over the entire mi

18、x. The 882 can be hooked up to any P.A. or DJ sound system exactly like an equalizer would. When using in conjunction with an equalizer, the 882 should be added after the equalizer in the signal chain. In the event that the equalizer is being used for drastic tone alteration, then insert the 882 bef

19、ore the equalizer in the signal chain. Placement either before or after an equalizer should have no negative effect on the 882 unit or its processing ability, however most users find they prefer more modest use of their equalizers once the BBE 882 has been added to their sound systems. Instrument Ra

20、cks The BBE 882 will deliver surprisingly good results in guitar, bass and keyboard rack systems. Electric guitars have added “bite”, “chunk” and improved definition. As Guitar Player magazine said, “BBE is the most cost effective improvement you can add to your rig”. Acoustic guitars processed with

21、 the 882 have a breathtakingly natural sparkle and presence. Bassists will delight in the BBE 882s ability to bring much more punch to the bottom end without muddying up the midrange. The 882 is also great for keyboard rigs, with everything from the latest samples to a vintage Rhodes benefiting equa

22、lly from the patented BBE process. Recording Systems The BBE 882 can be used as an effect on individual tracks or applied overall during mixdown. The BBE process works very well to liven up the final mix, which is why the BBE 882 and 482 models are popular for use in both recreational and profession

23、al recording studios. 2 W WA AR RN NI IN NGG! !T To o p pr re ev ve en nt t p po os ss si ib bl le e s sp pe ea ak ke er r o or r a am mp pl li if fi ie er r d da am ma ag ge e, , a al lw wa ay ys s p po ow we er r- -u up p p pe er ri ip ph he er ra al l d de ev vi ic ce es s f fi ir rs st t, , w wa

24、 ai it t 1 10 0 s se ec co on nd ds s, , a an nd d t th he en n t tu ur rn n o on n t th he e p po ow we er r a am mp pl li if fi ie er r. . T Tu ur rn n o of ff f p po ow we er r a am mp pl li if fi ie er r f fi ir rs st t, , t th he en n p po ow we er r- -d do ow wn n p pe er ri ip ph he er ra al

25、l d de ev vi ic ce es s. . 1. LED DISPLAY: The LED display is used to indicate the output signal level of the BBE 882. Each number on the front panel corresponds to the output signal level, measured in decibels. Example: The “+10” indicates a 10dBu signal level, “0” refers to 0dBu, and so on. Once a

26、n input signal level has been established, increasing the BBE PROCESS and LO CONTOUR will increase the output signal and cause more LEDs to illuminate. The Clip LED monitors the input signal level. The Clip LED will illuminate at +20dBu, giving a 3dBu warning of the impending distortion at +23dBu, t

27、he actual clip point. 2. LO CONTOUR: Each channel is equipped with a LO CONTOUR CONTROL. This control regulates the amount of phase corrected bass frequencies. 3. PROCESS:Each channel is equipped with a PROCESS CONTROL. This control regulates the amount of phase corrected treble frequencies. 4. BBE

28、FUNCTION: This push button switch allows for quick comparison of processed with unprocessed sound. When the switch is pushed in, the process is on and the indicator LED is green. When the switch is out, the process is off and the indicator LED is yellow. 5. CHANNEL B: These controls function the sam

29、e as CHANNEL A. 6. POWER: This switch controls primary power to the BBE 882. 3 FRONT PANEL CONTROLS 123465 C H A N N E L A -20-100+10CLIP-20-100+10CLIP FUNCTION POWER ONOFF M M INOUT BBE PROCESS SONIC MAXIMIZER 882 C H A N N E L BLO CONTOURPROCESSLO CONTOURPROCESS 4 REAR PANEL CONNECTIONS 1. AC POWE

30、R CORD: Plugs into AC power receptacle. U.S. Model, 100-120Vac, 50/60Hz. All other models,220-240Vac, 50/60Hz. 2. FUSE: Turn cap on fuse holder counter-clockwise to remove fuse. (Note: For U.S. Model, replace with 250Vac, 1/2A Fastblow type fuse. For all other models, replace with 250Vac, .125A Fast

31、blow type fuse.) 3. OUTPUT: The output of the BBE 882 can be taken from the 1/4” stereo TRS Phone Jack or the XLR Jack. Both are balanced and the same point electronically. This allows both outputs to be used simultaneously, eliminating the need for a “Y” cord in the event multiple, balanced outputs

32、 are required. The recommended single load impedance is at least 10k Ohms. If both outputs are being used, a minimum of a 22k Ohm load per device is required. (The “load” is determined by the input impedance of the next subsequent component in the signal chain.) The maximum output is rated at +23dBu

33、. Pin #2 is considered the hot or “+” signal. The output impedance of the BBE 882 is 600 ohms. NOTE: Actual output level will vary due to the selected position of the BBE Process, and the actual input signal level. If both the XLR and Phone Jacks are being used, both must be either balanced or unbal

34、anced. Otherwise a loss of signal level will occur. 4. INPUT: The input of the BBE 882 is a balanced connection. Although is can be either a TRS 1/4” stereo Phone Plug or an XLR Plug, it is recommended that only one input source be used. Both jacks are the same point electronically, however, due to

35、the input/output impedance characteristics of most audio devices, a loss of signal may occur and/or damage to a component if both inputs are utilized. Pin #2 is considered the hot or “+” signal. The input impedance of the BBE 882 is 14.7k Ohms. The maximum signal level is +23dBu. 5. CHANNEL A: These

36、 connections function the same as CHANNEL B. 12345 5 Specifications Frequency Response, process mode: Program controlled bypass mode:10Hz to 50kHz +/-0.5dBu, 0dBu input Signal to Noise: -92dBu THD,process mode: less than 0.025% at -0dBu input, 20-20kHz bypass mode:less than 0.002% at -0dBu input, 20

37、-20kHz Maximum Output:+23dBu (may vary due to control settings) Input Impedance: 14.7k Ohms, balanced 1/4TRS phone jack or XLR jack Pin #2 hot or “+”. Output Impedance: 600 Ohms, balanced 1/4TRS phone jack or XLR jack Pin #2 hot or “+”. Sensitivity: -45dBu for maximum process Maximum Process:+12dBu

38、boost at 5kHz, 0dBu input Lo Contour: +12dBu boost at 50Hz, 0dBu input * 0dBu = 0.775mVrms Power Requirements: U.S., Canada & Japan models: 120VAC, 50/60Hz, 8 WATTS Standard model: 220VAC, 50/60Hz, 8 WATTS Fuse:Replace with the same type FASTBLOW fuse U.S., Canada & Japan models: 250Vac, 1 /2A Fast

39、blow type fuse. Standard model: 250Vac, .125A Fastblow type fuse Dimensions: 19(W) x 5.5(D) x 1.7(H) Shipping Weight: 7 lbs. Note: Due to continuing product improvement, specifications and design are subject to change without notice. General Operation THE BBE 882 IS A BALANCED LINE LEVEL SIGNAL PROC

40、ESSOR AND IS TO BE CONNECTED PRIOR TO THE POWER AMP IN ANY AUDIO SYSTEM. SIGNIFICANT DAMAGE MAY BE INFLICTED TO THE BBE 882 OR ANY SUBSEQUENT COMPONENT IN THE SYSTEM IN THE EVENT THE OUTPUT OF A POWER AMP IS CONNECTED DIRECTLY TO THE INPUT OF THE BBE 882. In order to reduce the risk of damage to any

41、 equipment, properly connect all cables and power cables before turning on any components in the system. Most important of all, ALWAYS TURN ON THE POWER AMPLIFIER LAST TO AVOID DAMAGING THE SPEAKERS OR THE AMP. The BBE 882 may be utilized in a number of different environments and its results may var

42、y accordingly. Because both channels are completely independent from each other, only one channel of the BBE 882 may be used, or each channel processing a different signal source. The effects loop is the ideal placement in the signal chain of a guitar application. In a pre-amp, keyboard or P.A. appl

43、ication, the BBE 882 works best as the last component in the signal chain, just before the crossover or power amp. Important: In a P.A. application, never connect the BBE 882 into the effects loop. The inherent phase shift of the BBE Process will cause phase cancellation resulting in a partial loss

44、of signal. BBE and Equalization The most common question asked of the BBE Sound, Inc. service department is: “Where does the BBE Processor connect in the signal chain, before or after the equalizer?” Many people find that the same amount of equalization is no longer needed, if at all, when a BBE pro

45、cessor is used. Additionally, the amount of equalization used will help determine the BBE 882s proper location in the signal chain: If the EQ is being set to give the room a flat response as determined by a spectrum analyzer, the BBE 882 will work properly before or after the EQ. (Placing the BBE 88

46、2 after the EQ is recommended.) If the EQ is being used for drastic tone alteration, the recommended placement would be before the EQ. Neither of these configurations will harm the BBE 882. LIVE APPLICATION: NON-POWERED MIXER 6 Connect the BBE 882 to the output of the mixing console. The output of t

47、he BBE will drive either a crossover or a power amplifier directly. (If an equalizer is being used, refer to “BBE and Equalization” section under “General Operation.”) LIVE APPLICATION: POWERED MIXER 7 There are a couple of ways to configure the BBE 882 into a powered mixer. The ideal method would b

48、e into “Pre-Amp Out/Power Amp In” section of the console. If your console does not have this option, use the main or channel insert points. RECORDING MASTERING OR DUBBING 8 Use the BBE 882 for mastering the recording. Even if the BBE Process has been used on individual tracks, an improvement on the

49、total mix will be noticed. The BBE 882 can be utilized in the recording studio on individual instruments or on groups of instruments to improve the sound quality. INDIVIDUAL INSTRUMENTS 9 Use the BBE 882 in the effects loop or the main output of a guitar preamp. For keyboards, the output of the sub-mixer will be the ideal location. 10 SOUND CONTRACTORS DJ APPLICATION Connect the BBE 882 into the processor loop of a pre-amplifier/mixer and hear the music come alive! The BBE 882 will accept the output level of most sound contractor type mixers. 11 Service We recommend that if at a